R&S®EK895 VLF-HF Receiver
Compact ½ 19" DSP-based high-end receiver for radiocommunication, radiomonitoring and detection, search operation, DF systems and as frontend for HF intelligence tasks
Options
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| Base Unit | ||
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VLF-HF Receiver Compact ½ 19" DSP-based high-end receiver for radiocommunication, radiomonitoring and detection, search operation, DF systems and as frontend for HF intelligence tasks |
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| Internal Options | ||
| Control Panel |
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IF Converter The IF Converter R&S UX895 is a submodule for the IF/AF (DSP) processor. Instead of the analog IF output (0 Hz to 40 kHz) the IF Converter R&S UX895 linearly converts the set receive parameters to the IF of 455 kHz (100 kHz output frequency on request). This option allows connection of external signal processing units/analyzers operating with an input frequency of 455 kHz. |
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Input Filter Unit The input filter module comprises a lowpass filter, a bandpass filter and eight suboctave filters which are automatically selected with the receive frequency. It is also equipped with a signal input protection up to 30 V EMF (for the HF bands). The input filter unit has a very low insertion loss (≤1 dB) and an excellent large-signal behaviour matching with the receiver (no inherent distortion/hysteresis). The input filter unit is recommended to ensure unimpaired reception in an environment subject to RF interference (collocation). In this case, unwanted (interfering) frequency ranges are strongly suppressed. |
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BCD Interface The BCD interface provides the current receive frequency information with a resolution of 100 Hz to a parallel BCD output. This frequency information can be used to control external frequency dependent add-on units such as tuned Selection R&S FK101 or tuned active Antenna System R&S AK001. This option needs an additional output connector at the rear of the receiver (BCD interface). |
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TTY Line Current Source This option supplies the line current (40 mA at 60 V, or ±20 mA at ±30 V) required for direct connection of teletype units provided that FSK/AFSK demodulation (e.g. with R&S GM890) – standard for the R&S EK895/896 – is given. This option is recommended for the connection of older teletype units which still need line current. It is not required for modern teletype units that are operated under V.28 or TTL control. |
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This software option is used for the demodulation of DATA LINK emissions according to MIL-STD-188-203-1. Further information supplied on request. |
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Quasicontinuous IF Bandwidth Control This software option allows the fine selection of the IF bandwidth between 100 Hz and 9 kHz in 128 steps and thus permits optimization of the bandwidth required for the different types of modulation or of the adjacent-channel suppression. This option provides either 13 (standard) or 128 bandwidths. The advantage lies – especially important for radiodetection and analyzing receiving equipment – in the optimum S/N ratio setting for the signal received and demodulated. The optimum bandwidth can be stored with DEF OFF and is then automatically set again depending on the modulation type. This option has to be indicated when ordering the relevant receiver (factory installation). |
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Broadband Output The optional broadband output (plug-in module) supplies an approx. 1 MHz bandwidth signal at the first IF of 41.44 MHz (at the receive frequency ±500 kHz). To avoid impairment of the receiver sensitivity of the main (information) channel, the path to the broadband channel is decoupled by approx. 10 dB. For broadband spectrum analysis, different spectrum displays can be connected to this broadband output. |
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To obtain a higher frequency stability of the receiver, an OCXO module can be incorporated into the synthesizer instead of a standard crystal oscillator (TCXO). This option has to be indicated when ordering the relevant receiver (factory installation). |
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| External Options | ||
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Remote Control Unit |
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| Shockmount |
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| Service Kit |
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